stock fix,typo fix;

reserve code for admin;
self salse system (in work);

.gitignore

@@ -1 +1,3 @@
 main.exe
+.VSCodeCounter/*
+.vscode/*

admin_user.h

@@ -13,10 +13,30 @@
 #include "menu.h"
 #endif //MENU_H
 
-bool admin_menu(){
+// void admin_menu(){
-    system("cls");
+//     system("cls");
-    welcome_message();
+//     welcome_message();
+//     //the selection menu
+//     // if(login valid)
+//     int choice = admin_menu_user_choices();
+//     switch (choice)
+//     {
+//         case 1://action with inventory
+//             inv_control();
+//             break;
+//         case 2://action with transction
+//             tran_control();
+//             break;
+//         case 3://action with user
+//             user_control();
+//             break;
+//         case 4://Exit
+//             break;
+//         default://invalid input ,should not happen,as it is already catch in above function
+//             printf("Invalid choice\n");
+//             break;
+//     }
     
     
-    return true;
+//     return true;
-}
+// }

data_file_inventory.txt

@@ -1,31 +1,37 @@
-#category, brand, product, price`vc , stock, barcode
+#category, brand, product, price , stock, barcode
 Test
 Testing Co Ltd
 Testing Product
 15.0
+0
 1122
 Juice
 Mr Juicy
 Orange Juice Drink 360mL (Bottle)
 9.9
+0
 9665
 Juice
 F&N Fruit Tree
 Apple & Aloe Vera Juice Drink 500mL
 16.0
+0
 6479
 Juice
 F&N Fruit Tree
 Apple & Aloe Vera Juice Drink 1L
 22.9
+0
 5155
 Juice
 Homegrown Juice Company
 Cold Pressed NZ Apple Juice 1L
 35.5
+0
 6470
 T2
 T2 Brand
 T2 Product
 20.0
+0
 2983

database.h

@@ -78,7 +78,6 @@ typedef enum {
 
 
 
-//TODOLwrite function for these functions
 //list of db func
 int basic_get_row_count(int end, FILE *fp){
     fseek(fp, 0, SEEK_SET);//prevent pointer on wrong position
@@ -92,7 +91,6 @@ int basic_get_row_count(int end, FILE *fp){
             continue;
         }
         colmun_count++;
-        puts(buffer);
         if(colmun_count == end){
             row_count++;
             colmun_count = 0;

main.c

@@ -35,16 +35,18 @@ int main(){
         switch (choice)
         {
         case 1://admin
-            check = admin_menu();//refers to admin_user.h
+            //admin_menu();//refers to admin_user.h
+            check = true;
             break;
         case 2://normal user
-            check = normal_menu();//refers to normal_user.h
+            normal_menu();//refers to normal_user.h
+            check = true;
             break;
         case 3://exit
             check = false;
             break;
         default://invalid input
-            printf("Invalid choice...press anykey to retry....\n");
+            printf("Invalid choice...press any key to retry....\n");
             fflush(stdin);
             getchar();
             check = true;

normal_user.h

@@ -22,15 +22,19 @@
 //fucntions for menu
 void list_items();
 void search_item();
+void self_help_sale_system();
 void print_page(struct inventory db, int cur, int end,struct Map* map);
 int normal_menu_user_choices();
 
 //main of normal user
-bool normal_menu(){
+void normal_menu(){
+    int choice = 0;
+    do{
         system("cls");
         welcome_message();
         //the selection menu
-    int choice = normal_menu_user_choices();
+        
+        choice = normal_menu_user_choices();
 
         switch (choice)
         {
@@ -40,19 +44,16 @@ bool normal_menu(){
             case 2://Search item
                 search_item();
                 break;
-        case 3://scan barcode
+            case 3://self help sale system
-            // scan_barcode();
+                self_help_sale_system();
                 break;
             case 4://Exit
-            return false;
                 break;
-        default://invalid input 
+            default://invalid input ,should not happen,as it is already catch in above function
                 printf("Invalid choice\n");
-            return false;
                 break;
         }
-
+    }while(choice != 4);
-    return true;
 }
 
 //universal functions for normal user
@@ -72,10 +73,10 @@ void show_item(struct inventory db,int index){
 }
 int normal_menu_user_choices(){
     int choice;
-    printf("You can buy items inside the 2 option below\n");
+    printf("Normal User Menu\n");
     printf("1. List items\n");
     printf("2. Search item\n");
-    printf("3. Scan Barcodes\n");
+    printf("3. Self help sale system\n");
     printf("4. Exit\n");
     printf("Enter your choice: ");
     scanf("%d", &choice);
@@ -122,7 +123,7 @@ void list_page(struct inventory db,struct Map* map,int row){//user for showing l
         if(choice <=8 && choice > 0){
             printf("sorting...\n");
             map = sortItems(db,choice);
-        }else if(choice == page_size+3){
+        }else if(choice == page_size+3 && page + 1 < total_pages){
             page++;
         }else if(choice == page_size+4 && page > 0){
             page--;
@@ -145,10 +146,10 @@ void print_page(struct inventory db, int cur, int end,struct Map* map){
     for (int i = cur; i < end; i++)
     {
         if(map != NULL){
-            printf("%d item: %s\n", i + 9, db.row[map[i].key].product);
+            printf("%d item %d: %s\n", i + 9,i, db.row[map[i].key].product);
         }
         else{
-            printf("%d item: %s\n", i + 9, db.row[i].product);
+            printf("%d item %d: %s\n", i + 9,i, db.row[i].product);
         }
     }
 }
@@ -176,20 +177,21 @@ struct Map* sortItems(struct inventory db, int sort){
         switch(sort){
             case 1:
             case 2:
-                map[i].value = (int)db.row[i].product;
+                map[i].value = (void*)db.row[i].product;
                 break;
 
             case 3:
             case 4:
-                map[i].value = (int)db.row[i].price*100;//presume there is no price contain  0.001
+                long price = db.row[i].price * 100;
+                map[i].value = (void*)price;//presume there is no price contain  0.001
                 break;
             case 5:
             case 6:
-                map[i].value = (int)db.row[i].brand;
+                map[i].value = (void*)db.row[i].brand;
                 break;
             case 7:
             case 8:
-                map[i].value = (int)db.row[i].category;
+                map[i].value = (void*)db.row[i].category;
                 break;
         }
     }
@@ -212,11 +214,9 @@ struct Map* sortItems(struct inventory db, int sort){
 
 
 
-
-
 //search items
 char* prompt_search();
-char* searchItems(struct inventory db, char* searchstr);
+struct Map* searchItems(struct inventory db, char* searchstr);
 void search_item(){
     system("cls");
     welcome_message();
@@ -224,7 +224,6 @@ void search_item(){
     //prompt user to select an item
     //if user selects an item, display the item's details
     struct inventory db = read_db_invt();
-    int total_pages = 0;
     struct Map* map = NULL;
     do{
 
@@ -236,8 +235,9 @@ void search_item(){
         welcome_message();
         printf("0 exit\n");
         printf("1 search\n");
-        
+        printf("select your choice: ");
         scanf("%d", &breakout);
+        fflush(stdin);
         if(breakout == 1 || breakout == 0){
             valid = true;
         }else{
@@ -250,7 +250,7 @@ void search_item(){
     char* searchstr = prompt_search();
     printf("searching...\n");
     map = searchItems(db,searchstr);
-    if(map[0].value == 0){
+    if(map[0].value > 0){
         list_page(db,map+1,map[0].value);//ofset map, as it is use to store the size
     }else{//empty search
         printf("No result found\n");
@@ -271,13 +271,14 @@ char* prompt_search(){
     return searchstr;
 }
 
-char* searchItems(struct inventory db, char* searchstr){
+struct Map* searchItems(struct inventory db, char* searchstr){
     struct Map* map = malloc(sizeof(struct Map) * (db.db.row_count+1));
     int k = 1;
     for (int i = 0; i < db.db.row_count; i++){
         map[k].key = i;
         if(strstr(db.row[i].product,searchstr) != NULL){
-            map[k].value = db.row[i].product;
+            
+            map[k].value = (void*)db.row[i].product;
             k++;
         }
     }
@@ -286,3 +287,241 @@ char* searchItems(struct inventory db, char* searchstr){
     return map;
 }
 
+//self help
+typedef struct cart{//linked list
+    struct inventory_row* row;//pointer to the row
+    int quantity;//quantity of the item
+    struct cart* next;
+};
+
+int self_choice();
+struct cart* scan_barcode(struct cart* cart,struct inventory db);
+struct cart* list_cart(struct cart* cart);
+void self_help_sale_system(){
+    system("cls");
+    welcome_message();
+    //scan barcode
+    struct inventory db = read_db_invt();
+    struct cart* cart = NULL;
+    bool check = false;
+    do{
+
+    //options
+    int breakout = 0;
+    int choice = self_choice();
+    switch (choice)
+    {
+    case 1:
+        cart = scan_barcode(cart,db);
+        check = true;
+        break;
+    case 2:
+        cart = list_cart(cart);
+        check = true;
+    default:
+        break;
+    }
+    }while(check);
+}
+
+int self_choice(){
+    int choice = 0;
+    bool valid = false;
+    do{
+        system("cls");
+        welcome_message();
+        printf("0 exit\n");
+        printf("1 scan barcode\n");
+        printf("2 cart\n");
+        printf("3 checkout\n");
+        printf("select an option: ");
+        scanf("%d", &choice);
+        if(choice <= 3 || choice >= 0){
+            valid = true;
+        }else{
+            printf("Invalid choice\n");
+        }
+    }while(!valid);
+    return choice;
+}
+//support for the linked list
+struct cart* Cartappend(struct cart* cart,struct inventory_row* row,int quantity){
+    if(cart == NULL){
+        cart = malloc(sizeof(struct cart));
+        cart->row = row;
+        cart->quantity = quantity;
+        cart->next = NULL;
+    }else{
+        struct cart* temp = cart;
+        while(temp->next != NULL){
+            temp = temp->next;
+        }
+        temp->next = malloc(sizeof(struct cart));
+        temp->next->row = row;
+        temp->next->quantity = quantity;
+        temp->next->next = NULL;
+    }
+    return cart;
+}
+
+struct cart* Cartremove(struct cart* cart,int index){
+    if (cart == NULL){
+        return cart;
+    }else{
+        struct cart* temp = cart;
+        if (index == 0){
+            cart = cart->next;
+            free(temp);
+            return cart;
+        }else{
+            for (int i = 0; i < index-1; i++){
+                temp = temp->next;
+            }
+            struct cart* new = temp->next->next;
+            free(temp->next);
+            temp->next = new;
+            return cart;
+        }
+    }
+}
+struct cart* Cartupdate(struct cart* cart,int index,int quantity){
+    if (cart == NULL){
+        return cart;
+    }else{
+        struct cart* temp = cart;
+        if (index == 0){
+            cart->quantity = quantity;
+            return cart;
+        }else{
+            for (int i = 0; i < index-1; i++){
+                temp = temp->next;
+            }
+            temp->next->quantity = quantity;
+            return cart;
+        }
+    }
+}
+
+//scan barcode
+struct inventory_row* find_barcode(struct inventory db,long barcode);
+long prompt_barcode();
+struct cart* scan_barcode(struct cart* cart,struct inventory db){
+   
+    long barcode = prompt_barcode();
+    printf("matching...\n");
+    struct inventory_row* row = find_barcode(db,barcode);
+    if(row != NULL){
+        printf("product: %s\n",row->product);
+        printf("price: %.2f\n",row->price);
+        printf("Enter quantity: ");\
+        int quantity = 0;
+        scanf("%d", &quantity);
+        if(quantity > 0){
+            cart = Cartappend(cart,row,quantity);
+    }else{//empty search
+        printf("Unable to match or invalid input\n");
+
+    }
+    }while(true);//break on top
+    return cart;
+}
+
+
+long prompt_barcode(){
+    printf("Please scan the qr code(or input the barcode ) ");
+    long barcode;
+    scanf("%ld", barcode);
+    return barcode;
+}
+
+struct inventory_row* find_barcode(struct inventory db,long barcode){
+    struct inventory_row row;
+    printf("s");
+    for (int i = 0; i < db.db.row_count; i++){
+    printf("s");
+        printf("%ld\n",db.row[i].barcode);
+        if(db.row[i].barcode == barcode){
+            
+            return &db.row[i];
+        }
+    }
+    return (struct inventory_row*)NULL;
+}
+
+
+//list cart
+struct cart* cart_control(struct cart* cart,int index);
+struct cart* list_cart(struct cart* cart){
+        int choice = 0;
+    do{
+        system("cls");
+        welcome_message();
+        double total_price = 0;
+        int i=1;
+        printf("0 exit\n");
+        if(cart == NULL){
+            printf("Cart is empty\n");
+        }else{
+            struct cart* temp = cart;
+            while(temp != NULL){
+                int qty = temp->quantity;
+                double price = temp->row->price * qty;
+                total_price += price;
+                printf("%d product:%s price:$%lf qty:%d\n",i,temp->row->product,price,qty);
+                temp = temp->next;
+                i++;
+            }
+            printf("Total price: $%.2f\n",total_price);
+        }
+        do{
+            printf("input the corrisponding value for more action\n");
+            scanf("%d", &choice);
+            if(choice >0 && choice <= i){
+                cart = cart_control(cart,choice);
+            }   
+        }while(choice >0 && choice < i);
+    }while(choice != 0);
+    return cart;
+}
+struct cart* update_cart(struct cart* cart,int index);
+struct cart* cart_control(struct cart* cart,int index){
+    int choice = 0;
+    do{
+        system("cls");
+        welcome_message();
+        printf("0 exit\n");
+        printf("1 remove\n");
+        printf("2 edit quantity\n");
+        bool check = false;
+        do{
+            scanf("%d", &choice);
+            if(choice == 1){
+                cart = Cartremove(cart,index-1);
+                check = true;
+            }else if(choice == 2){
+                cart = update_cart(cart,index);
+                check = true;
+            }else if(choice != 0){
+                printf("Invalid choice\n");
+                check = false;
+            }
+        }while(!check);
+    }while(choice != 0);
+    return cart;
+}
+
+struct cart* update_cart(struct cart* cart,int index){
+    system("cls");
+    welcome_message();
+    printf("enter the new quantity: ");
+    int quantity = 0;
+    scanf("%d", &quantity);
+    if(quantity > 0){
+        cart = Cartupdate(cart,index-1,quantity);
+    }else if (quantity == 0){
+        cart = Cartremove(cart,index-1);
+    }else{
+        printf("Invalid quantity\n");
+    }
+    return cart;
+}

sorting.h

@@ -1,6 +1,6 @@
 typedef struct Map{
     int key;
-    int value;
+    void* value;
 };
 
 int compare_decending(const void *a, const void *b){